3648637 has 4 divisors (see below), whose sum is σ = 3667356. Its totient is φ = 3629920.

The previous prime is 3648587. The next prime is 3648643. The reversal of 3648637 is 7368463.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7368463 = 17 ⋅433439.

It can be written as a sum of positive squares in 2 ways, for example, as 3606201 + 42436 = 1899^2 + 206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3648637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3648596 and 3648605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3648647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9064 + ... + 9457.

It is an arithmetic number, because the mean of its divisors is an integer number (916839).

Almost surely, 2^3648637 is an apocalyptic number.

It is an amenable number.

3648637 is a deficient number, since it is larger than the sum of its proper divisors (18719).

3648637 is a wasteful number, since it uses less digits than its factorization.

3648637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18718.

The product of its digits is 72576, while the sum is 37.

The square root of 3648637 is about 1910.1405707434. The cubic root of 3648637 is about 153.9490048729.

The spelling of 3648637 in words is "three million, six hundred forty-eight thousand, six hundred thirty-seven".